<!doctype html>
<html>
<head>
    <meta charset="utf-8">
    <title>Globe - ECHARTS-GL</title>
    <meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no">
    <meta name="apple-mobile-web-app-capable" content="yes"> <!-- Fullscreen Landscape on iOS -->
    <link rel="stylesheet" href="./common.css">
</head>
<body>
<div id="main"></div>
<script src="../node_modules/echarts/dist/echarts.js"></script>
<script src="../dist/echarts-gl.js"></script>
<script src="lib/jquery.min.js"></script>
<script src="js/commonUI.js"></script>
<script>
    var chart = echarts.init(document.getElementById('main'));

    // http://visibleearth.nasa.gov/view_cat.php?categoryID=1484
    chart.setOption({
        globe: {

            baseTexture: 'asset/world.topo.bathy.200401.jpg',
            heightTexture: 'asset/elev_bump_4k.jpg',

            displacementScale: 0.1,

            shading: 'realistic',
            realisticMaterial: {
                roughness: 0.8,
                metalness: 0
            },

            postEffect: {
                enable: true
            },
            temporalSuperSampling: {
                enable: true
            },
            light: {
                ambient: {
                    intensity: 0
                },
                main: {
                    intensity: 6,
                    shadow: true
                },
                ambientCubemap: {
                    texture: 'asset/pisa.hdr',
                    exposure: 2,
                    diffuseIntensity: 0.1,
                    specularIntensity: 1
                }
            },
            viewControl: {
                animationDurationUpdate: 1000,
                animationEasingUpdate: 'cubicInOut',
                autoRotate: false
            }
        },
        series: []
    });

    setInterval(function () {
        var alpha = Math.random() * 100 - 50;
        var beta = Math.random() * 360 - 180;
        chart.setOption({
            globe: {
                viewControl: {
                    beta: beta,
                    alpha: alpha
                }
            }
        });

        console.log(Math.round(alpha), Math.round(beta));

    }, 2000);

    window.addEventListener('resize', function () {
        chart.resize();
    });

</script>
</body>
</html>
